GM bulletin PIE0733A
What it saysThis engineering information (EI) closure ends the need for gathering further information from technicians in regard to the A/C being inoperable. NHTSA’s full summary ↓
GM filed this with NHTSA as a service bulletin dated Aug 16, 2023, received Sep 15, 2023, about the engine. It names 4 model years across Chevrolet and Cadillac (2022–2023). A service bulletin is not a safety recall: it is the manufacturer telling its dealers how to diagnose or repair a condition, and whether the work is paid for depends on the warranty in force. Quoting the number at a service desk can save a diagnosis.
One page for every brand it was filed under. Each brand’s bulletins: Chevrolet · Cadillac.
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What the bulletin says
Source: NHTSA's summary of the manufacturer's communicationThis engineering information (EI) closure ends the need for gathering further information from technicians in regard to the A/C being inoperable.
Document filed under this number
| Document | Kind | Dated | NHTSA id | At NHTSA |
|---|---|---|---|---|
| PIE0733A | Service bulletin | Aug 16, 2023 | 10242254 | PDF, 53 KB |
The summary is NHTSA’s abstract of the document, as filed under 49 CFR 579.5. One communication is usually filed as several documents — the bulletin, a dealer notice, an owner letter — and the number on any of them finds this page. A PDF link is shown only once NHTSA’s own server has been seen to serve that document; the rest are checked over the following nights. Quote the number at a service desk; it is what the dealer’s system is keyed on.
Model years it names
Source: as the manufacturer filed themChevrolet 2 model years
Cadillac 2 model years
A vehicle page’s bulletin list shows the newest few communications filed against that model year; the count there is every one.
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What owners reported
Source: NHTSA complaint databaseOwners of the 4 model years this bulletin names have filed 125 complaints with NHTSA since 2015. 36 of them name Engine — the same broad component group this bulletin is filed under. NHTSA groups complaints coarsely, so that means the same area of the vehicle, not necessarily the same fault.
2023: 16K miles, the Chevrolet Blazer in questions transmission went out; thus requiring it to be brought into the dealership for repair; It was "repaired" and given back to us. A few days after said repair, I was driving it with my son in the vehicle, and the transmission went out while on the highway.
2022 Chevrolet Blazer · Engine · filed with NHTSA Jul 29, 2025 · ODI 11676891
The contact owns a 2023 Chevrolet Blazer. The contact stated that while driving at an undisclosed speed and making a left turn, the vehicle unexpectedly came to a complete stop for several seconds, and then was able to continue driving. An unknown warning light was illuminated.
2023 Chevrolet Blazer · Engine · filed with NHTSA May 28, 2024 · ODI 11590990
When driving the whole car shakes and the engine makes a loud sound. It doesn't matter if I am going 10 mph or 75 mph the same shaking happens. The engine smells like burnt rubber. Driving feels like jerking not a smooth ride. I have already had the engine oil leak repaired.
2023 Cadillac XT5 · Engine · filed with NHTSA Apr 10, 2026 · ODI 11730360
A complaint is one owner’s account, not a defect finding, and a bulletin is not a recall. Nothing here says this bulletin was issued because of these complaints, or that the repair it describes fixed them. Complaint files on this site begin in 2015.
More bulletins about the engine
Source: same model, same component group75 other manufacturer communications filed against these GM models under the same component group (engine), newest first. The eight newest are listed; the rest are on the Chevrolet list.
| Number | Kind | Dated | NHTSA’s summary |
|---|---|---|---|
| N262570770-03 | Service campaign | Oct 16, 2026 | Certain vehicles may have a condition in which the thermal break tabs induce stress into the radiator causing a coolant leak. Dealers are t… |
| N262570770-02 | Service campaign | Sep 25, 2026 | Certain vehicles may have a condition in which the thermal break tabs induce stress into the radiator causing a coolant leak. Dealers are to… |
| N262570770-01 | Service campaign | Sep 18, 2026 | Certain vehicles may have a condition in which the thermal break tabs induce stress into the radiator causing a coolant leak. Dealers are to… |
| N262570770 | Service campaign | Sep 15, 2026 | Certain vehicles may have a condition in which the thermal break tabs induce stress into the radiator causing a coolant leak. Dealers are to… |
| N262568830 | Service campaign | Aug 4, 2026 | Certain vehicles listed above may have a condition in which the oil filter was not adequately tightened. Dealers are to check and tighten th… |
| N252508350 | Service campaign | Oct 21, 2025 | Certain vehicles listed above, may have a condition that could cause the engine coolant thermostat to open at a lower temperature than inten… |
| N252502891 | Service campaign | Jul 16, 2025 | Customer Satisfaction Program. Certain vehicles listed above may have a condition in which the internal differential nut was cross threaded… |
| N252502890 | Service campaign | Jul 16, 2025 | Customer Satisfaction Program. Certain vehicles listed above may have a condition in which the internal differential nut was cross threaded… |
Quote the number at the service desk. It is what the dealer’s system is keyed on.
Every manufacturer communication NHTSA holds for Chevrolet and Cadillac, by the number printed on the letter.
Common questions
Source: NHTSA, 49 CFR 579.5Is GM PIE0733A a recall?
No. A service bulletin is a manufacturer communication filed with NHTSA under 49 CFR 579.5; a safety recall carries an NHTSA campaign number (two digits, a letter, six digits) and a federal duty to repair for free. Check the vehicle’s recalls by VIN at nhtsa.gov/recalls, or on its page here.
Is the PIE0733A repair free?
Not automatically. A service bulletin describes how to diagnose or repair a condition; who pays depends on the warranty in force, any extension, and the dealer. Quoting the number can save a diagnosis either way. Every GM warranty extension on file lists the ones GM has filed.
Which vehicles does PIE0733A cover?
The manufacturer filed it against 4 model years across 2 brands (Chevrolet and Cadillac): 2023 Cadillac XT5, 2022 Cadillac XT5, 2023 Chevrolet Blazer, 2022 Chevrolet Blazer. Whether one particular vehicle is affected is a matter of its VIN and its build, not its model year alone.